CRYOGENIC VACUUM VALVE

摘要

A multifunction cryogenic vacuum valve adapted to evacuate, seal off, and monitor vacuum levels and relieve cryogenic vacuum insulated systems is provided, wherein no thread sealant is necessary for the thermocouple threads.

主权项

1. A cryogenic vacuum valve, comprising:
a valve body forming a wide body cavity fluidly communicating with a narrower narrow body cavity; a valve plug defined by a circumferential surface dimensioned and adapted to snugly fit within the narrow body cavity; a top plug o-ring groove formed along an upper portion of the circumferential surface; a bottom plug o-ring groove formed along an lower portion of the circumferential surface so as to be spaced apart from the top plug o-ring groove, wherein the bottom plug o-ring groove is omega shape, and wherein the omega shape has a upper apex and a remaining portion; a thermocouple exposure slot formed along the circumferential surface so as to be disposed downward of the upper apex; and a thermocouple vacuum exposure hole formed through the valve body to fluidly communicate with the narrow body cavity, wherein the valve plug is movable from a go position to a stop position communicating the thermocouple vacuum exposure hole with the thermocouple exposure slot.